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Chess Opening Theory/1. e4/1...e5/2. f4/2...exf4/3. Bc4/3...Qh4/4. Kf1
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King's Gambit Accepted rd nd bd kd bd nd rd pd pd pd pd pd pd pd bl pl pd qd pl pl pl pl pl pl rl nl bl ql kl nl rl
King's Bishop Gambit Accepted
4. Kf1
White now cannot castle, but does have the chance to obtain a lead in development via Nf3, attacking the queen.
Theory table
1. e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4. Kf1
4
...d5
Bryan Countergambit
...b5
Bishop's Gambit
Modern Chess Openings: MCO-14. 1999. Nick de Firmian, Walter Korn. 0-8129-3084-3.